Table C-11. Hydrostatic Test Data for Nominal 1.50-Inch (D;) -2.25-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 51 -55 



(Sealed with grease; 



radial c 



earance 0.005 to 0.010 inch 



; nominal Dq/D; i 



utio 1.5) 









Specimen Number 







Value 





Parameter 



















51 



52 



53 



54 



55 



Max 



Avg 



Min 



Thickness (in.) 



0.496 



0.497 



0.496 



0.499 



0.497 



0.499 



0.497 



0.496 



Dq (actual, in.) 



2.237 



2.240 



2.237 



2.237 



2.238 



2.240 



2.238 



2.237 



Temperature (°F) 



69 



66 



68 



68 



68 



69 



68 



66 



t/Dj Ratio (actual) 



0.330 



0.331 



0.330 



0.333 



0.331 



0.333 



0.331 



0.330 



Pressurization Rate (psi/min) 



680 



695 



689 



662 



670 



695 



679 



662 



Pressure (psi) 



Axial D 



isplaceme 



nt of Cer 



ter Point 



on Window's Low- 



'ressure Face (in.) 



1,000 



0.003 



0.001 



0.001 



0.001 



0.003 



0.003 



0.002 



0.001 



2,000 



0.014 



0.007 



0.012 



0.002 



0.010 



0.014 



0.009 



0.002 



3,000 



0.022 



0.016 



0.018 



0.012 



0.018 



0.022 



0.017 



0.012 



4,000 



0.029 



0.023 



0.028 



0.021 



0.027 



0.029 



0.026 



0.021 



5,000 



0.040 



0.036 



0.036 



0.031 



0.036 



0.040 



0.036 



0.031 



6,000 



0.077 



0.053 



0.065 



0.040 



0.062 



0.077 



0.059 



0.040 



7,000 



±/ 



0.088 



0.085 



0.052 



0.088 



0.088 



0.079 



0.052 



8,000 





0.120 



0.119 





ly 



0.120 



0.120 



0.119 



9,000 



















10,000 



















Displacement at Failure (in.) 





0.152 



0.146 



0.122 





0.152 



0.130 



0.122 



Pressure at Failure (psi) 



7,300 



8,550 



8,450 



7,450 



7,300 



8,550 



7,810 



7,300 



\_/ Deflection wire became disengaged. 



Notes: 



1. Grease I iberal ly applied. 



2. 500-psi preload. 



3. Audible cracking at about 7,000 



psi. 



59 



